Why SE does not allow similar transformation with audio tracks, not only MIDI?
A 01: SE analyzes and transforms only MIDI-data. Wave-files are absolutely a different kind of data. MIDI-sequence is a model, parametrical representation of musical performance, whereas the wave-file is “analog” one. Think of it as of a “bitmap” and “vector graphic”. Probably in future PM-technology will be applied to audio-data as well, and we hope to be able to offer our input here too.